How many ways do I love thee.... OK let me try.
1. Bullet goes in the top, comes out the bottom, one bullet pushes the next out. You put clean bullets in the top, the lubed bullets come out the bottom. Much faster than put one in, take it out, put one in take it out, plus you don't have to handle messy lubed bullets.
2. Star has a pressure spring to maintain lube pressure, and a lube "pump". tightening down on the spring provides the pressure to keep the pump fed. After you put some tension on the spring, you can size 50-100 bullets. You don't have to turn the handle every two or three bullets.
3. With a Star, the lube goes where you want it. The pump is actuated after the bullet is in place, you can set it so that it fills one lube groove, two grooves, or all of them. You can even set it so you fill the top and bottom and not the middle. And, with bevel base bullets, you don't fill the bevel with lube that has to be wiped off.
As for accuracy, I doubt if an advantage can be claimed by any sizer. I think accuracy comes down to sizing your bullets to the right dimension for your particular firearm, using the right lube for the situation, and doing it the same way time after time. The Star can certainly do that, but so can a Lyman or RCBS.....but as I said, once you have tried a Star, you won't go back.
